Please see below, as this is what i used for the same cause:
The Consulate General,
The British High Commission,
Subject: Sponsorship letter for <>
I am currently staying in UK. I am working as a <Designation> in <Company Name>. I would like to sponsor the stay of my <Parents> <Mrâ€¦â€¦â€¦â€¦, Mrs.......> for a period of 6 months (Variable), during his visit to UK.
I am submitting herewith the following details for your evaluation and reference.
Name of the sponsor: <â€¦â€¦.>
<................> â€“ <POST CODE>
Telephone Number: (R) 0<.......>
VISA Status: <>
VISA Expiry Date: <>
Passport Number: <>
Sponsoring for: <>
I am enclosing herewith copies of my;
2. Proof of residence
3. Utility Bills
4. Letter from Employer.
I request you to kindly allow my <â€¦â€¦> to visit me, by issuing them the required visa.
If you require any further information, I will be pleased to furnish the same.
I am under HSMP tier 1 in the U.K. and my father in law wants to visit the U.K. I will really appreciate if somebody could send me a template letter for sponsoring the inlaws which I might tailor to my circumstances.
The text of the letter can be pasted in the reply or alternatively sent to my email address at firstname.lastname@example.org
It is regarding my in laws so don't want to be wrong at any cost.
You know what I mean
I will really appreciate any help in this regards,